Papers by Keyword: Cotton Fabric

Abstract: The fixing performance of chitosan hydrochloride (CSH) with different molecular weight and chitosan biguanide hydrochloride (CSGH) as a fixing agent for cotton fabric dyed with reactive dyes was discussed. The results showed that the fixing effects of CSH on reactive dyes were related to its molecular weight, and the CSH with high molecular weight (HMW) exhibited better fixing effects than that with low molecular weight (LMW). The fixing effects of CSGH on reactive dyes were superior to that of the CSH with HMW, because of the CSGH molecule with positive charges and the imino groups, which could further strengthened the interaction among the CSGH, dyes and cellulose molecules. After treated by the CSGH, the soaping, perspiration and dry rubbing fastness of the dyed fabrics could be increased 0.5 to 1 grade, while the wet rubbing fastness of ones was also improved obviously. The infrared spectrum (FTIR) of the dyed fabric treated by CSGH showed that a cross-linking was formed among CSGH, dyes and cellulose molecules.

Abstract: In this paper, poly (vinylalcohol glycidyl ether) (PVAGE) was synthesized as a novel reactive stiffening agent to improve the stiffness of cotton fabric. Cotton fabric could be grafted with PVAGE under high temperature and the grafting rate would increase with the increase of PVAGE concentration. The cotton fabric grafted with PVAGE has excellent washing durability. The wearability of cotton fabric grafted with PVAGE was also studied. As the increase of grafting rate, the flexural stiffness increased dramaticly; tensile strength increased a little; cockle elastic decreased slightly; and air permeability and whiteness also decreased but were still in acceptable range.

Abstract: Abstract: A novel oligomeric P–N synergistic flame retardant (FR) poly(phenyl O–(2–aminoethyl) phosphonamidoate) (PPAP) was synthesized and characterized by fourier transform infrared spectrometry (FT–IR) and 1H nuclear magnetic resonances (1H NMR). Application of PPAP on cotton fabric was studied, and the results showed that the best dosage of PPAP and coupling agent tetraethyl orthosilicate (TEOS) were 350 g/L and100 g/L respectively. Under these conditions, the treated cotton fabric was tested with 10.6 cm of char length. The results of thermogravimetric analyser (TGA) indicated that the fabrics treated with PPAP were more stable in high temperature compared with original fabrics. All the results implied PPAP can be used as a promising FR.

Abstract: Cotton fabric was polished with cellulase in this paper. The effect of enzyme dosage, pH processing temperature and time on reducing sugar and weight loss were investigated. Enzymatic treatment was found to increase surface smoothness of cotton fabric because most surface fuzzes were removed. The optimum condition of bio-polishing process was as follows: enzyme dosage 3% owf, pH 4.5, processing temperature 50°C, time 60 minutes, liquor ratio 1:20.

Abstract: In this study, corona discharge treatment is applied to cotton fabric at various discharge voltages and time. The dye uptake of treated fabric was increased when the applied voltage and treating time increased. Its effects on surface modification of cotton fabric and its application in finishing are investigated with a range of analytical methods. The results suggest that corona discharge can be successfully applied the finishing of cotton fabric, especially in the green processing of dyeing.

Abstract: A novel polymer APFC containing quaternary ammonium and perfluoroalkyl groups was designed and prepared by emulsion polymerization using interfacial redox initiator system, the average size of the emulsion particles was about 103nm, APFC was applied on cotton fabrics to show the antimicrobial activities and optimum water and oil repellency by a pad-dry-cure process, the water repellency scores and oil repellency ratings of the cotton fabrics finished with APFC can reach 100 and 6, respectively. We evaluated the efficacy of the antimicrobial activity of cotton fabric finished with APFC , the antimicrobial test result of the finished cotton fabric showed a 97.4% reduction in the number of Staphylococcus aureus (ATCC6358) and a 90.5% reduction in the number of Escherichia coli (ATCC8099).

Abstract: A series of modified nanoTiO₂ photocatalysts, nanoPC, was applied to cotton fabrics through a pad-dry-cure process. The effect of nanoPC dosage, the ratio of nanoPC to crosslinking agent, and curing conditions on the degradation of formaldehyde were discussed. The optimal finishing process of cotton fabric with nanoPC was determined as follows: 1%~1.5% photocatalyst, curing at 130°C for 5 minutes. Cotton fabric treated with the above process demonstrated over 90% degradation of formaldehyde, good washing fastness and soft handle, as well as little loss in breaking strength, tearing strength and polymerization degree.

Abstract: Application of citric acid (CA), as cross-linking agent, on grafting β-cyclodextrin (CD) to cotton was studied. Some influence factors on the grafting of β-cyclodextrin, such as the concentration of CA, β-cyclodextrin and catalyst, curing conditions (temperature, time) were discussed. The grafting procedure was to soak the fabric samples in an aqueous solution containing β-CD 60 g/L, citric acid 100 g/L and sodium hypophosphite 30 g/L, then the squeezed samples were dried and cured at 190°C for 4 min. The cotton fabric grafted with β-cyclodextrin and then perfumed with menthol preserved 27.04% menthol after ten days, and its anti-bacterial performance was observed.

Abstract: A temperature-sensitive N-isopropylacrylamide (NIPAAm) grafted cotton fabric was prepared by the plasma-induced graft polymerization technique. The surface morphology of the grafted fabric was observed from field scanning electron microscopy (FSEM). Fourier transform infrared spectroscopy (FTIR) and DSC were used to characterize the structure and thermal property of the grafted fabric. The results showed that the PNIPAAm was grafted onto cotton fabrics. The DSC analysis results indicated that LCST value of the grafted fabric was around 32 °C. The water permeation flux of the grafted fabric varied dramatically with a slight change at temperature around the LCST, which showed that the grafted PNIPAAm could act effectively as a chemical valve to control the on-off behavior of cotton fabrics.

Abstract: Cottons dark-dyeing with sulfur black was studied in this paper. Its a simple process for cotton because of no bleaching, just only desizing, scouring and dyeing with two steps in one-bath. Through adjusting technical parameters, the optimum conditions were obtained: NaOH 6 g/L, Na₂SiO₃ 2 g/L, scouring agent 2 g/L, JFC 1 g/L, sulfur black 14%, Na₂S 16%, carbamide 2 g/L, bath ratio 1:20, scouring and dyeing at 95 °C for 45 min and 35 min separately. Compared the simple process with the traditional one, the former can get similar performance on dyeing. In addition, the simple process showed such advantages as short time, high efficiency, reduced energy consumption, relatively low water consumption and reduced sewage emission.